Adjustable base for antenna masts



Sept, 23, 1952 v LAND|5 2,611,566 I ADJUSTABLE BASE FOR ANTENNA MASTS Filed D90. 12, 195() i mmvrox. j HAROLD 0. LAND/.5.

ATTORNEY Patented Sept. 23, 1952 T ATES ADJUSTABLE BASE FDR ANTENNA MASTS Harold 0. Landis, Reading, Pa., assignor to Berks Electronic Service, Inc., Reading, Pa., a corporation of Pennsylvania Application December 12, 1950, Serial No. 200,341

This invention relates to bases or mountings for the vertical support of antenna poles or masts on roofs of buildings and more especially to a mounting which can be adjusted to provide a firm anchorage and support on the ridge formed at the junction of two adjacent roof areas extending angularly to each other.

One object of the invention is to provide a base for antenna masts which can be adjusted to straddle the ridge between two adjacent, angularly arranged roof areas and have its base plates and brackets support the mounting proper in a vertical position from both of the roof areas.

Another object is'to provide an adjustable base for antenna masts made up of two base plates which support the mounting for the mast by means of a pair of brackets that are slidably connected so as to provide an angular adjustment of these base plates relative to each other.

A further object is to provide an adjustable base for antenna masts made up of a pair of base plates that are slidably connected by a pair of arcuately shaped and concentrically arranged brackets in order to provide angular adjustments of the base plates relative to each other.

Still another object is to provide an adjustable base for antenna masts made up of a pair of base plates that are connected by brackets fixed on the base plates and connected to provide a joint support for the mounting of the mast.

A further object is to provide an adjustable base for antenna masts in which the mounting proper is slidabl y' mounted and angularlyadjustable between a pair of base plates.

Another object is to provide an adjustable base for antenna masts .made up of a pair of base plates having arcuately shaped brackets arranged side by side and provided with corresponding arcuately shaped slots and novel clamping and guiding means cooperating with the slots for guiding the brackets in an arcuate adjusting movement and for adjustably clamping the support proper for its vertical support of the antenna mast on the brackets between the base plates.

A further object is to so construct the adjustable base for antenna masts that but one clamping bolt is needed to provide for'any angular adjustment of the base to the roof angles as well as provide an independent angular adjustment of the mast support on the base.

A still further object is to provide a novel adjustable base for antenna masts in which the support of the mast is bifurcated at the bottom for engagement with a supporting bracket on the base in such a manner that a clamping bolt 5 Claims. (o1. 248-44) arranged in the ends of the bifurcated portion of the support passes through the bracket and makes threaded engagement with a clamping nut held against rotation in one of the bifurcated ends to cause the nut to be drawn into clamping contact with one side of the bracket while the opposing portion of the bifurcated end of the support is drawn into clamping contact with the opposite side of the bracket.

With these and other objects in view which will become more readily apparent from the following detailed description of the practical and illustrative embodiment shown in the accompanying drawing, my invention comprises the novel adjustable base, its features of construction and arrangement of parts in cooperative relationship, as more particularly defined and indicated by the hereunto appended claims.

In the accompanying drawing:

Figure 1 is a top plan view of my novel adjustable base for antenna masts.

Fig. 2 is a side elevational view thereof illustrating its adjustability to roof areas arranged at different angles.

Fig. 3 is a detail bottom plan view of the adjustable clamping connection between the mast support proper and its supporting brackets.

Fig. 4 is an end elevational view of the justable antenna base.

It will be helpful to an understanding of my invention to first briefly consider some of the more important aspects and features thereof, so that these may be kept in mind during the subsequent reading of the detailed description of the practical and illustrative embodiment shown in the accompanying drawing. Accordingly, it is noted that my invention may be used for the support of the bottom end of any rod or tubing which is to be mounted at the ridge or ledge formed by two angularly converging supporting areas such as is found in roof and wall construe tions or a combination of them.

In the erection of antenna masts the mount ing of it must frequently be made over the peak of a roof or over a ledge or ridge formed by two roof or Wall areas which extend angularly relative to each other. In order to make this possible it has heretofore been necessary to use an anten na base that was made to fit the particular angular condition of the roof or to build up a foun' dation on the roof so that a flat or straight base could be used. The use of a base to fit the angles of a particular roof in the majority of cases is out .of the question because roof angles vary greatly especially in the older type houses and to build up a foundation on the roof for a straight or flat base requires considerable time and at best provides but a makeshift which will never provide a completely satisfactory installation.

The antenna mounting forming the subject matter of my present invention is made adjustable so that it may be quickly and easily fitted for its support over the ridge or ledge between any two adjacent roof or wall areas that extend angularly to each other. For this purpose the mounting has two base plates each of which carries an arcuately shaped bracket with a correspondingly arcuate shaped slot longitudinally extending therein. These brackets are located side by side and so connected by a clamping bolt supplemented by guide pins, that an arcuate and concentric sliding movement is provided for each bracket either independently or jointly in order to bring their base plates into the angular position which corresponds to the angular arrangement of the roof areas to which these base plates are to be anchored.

After the base plates are thus fitted to the angles of the roof and suitably fastened thereto, the mast support proper is moved on the brackets for adjustment to a point where this support will hold the bottom of a mast in a perfectly vertical position on the roof. The mast support is clamped in place in this position by means of the single clamping bolt and the support so engages the brackets that this clamping bolt not only holds the support firmly in place on the brackets but also looks the brackets in their adjusted angular position on the roof.

The mast support is constructed to provide an adjustable socket for the engagement of the end of masts of varying diameters, so that when the bottom end of a mast is set into it, it can be firmly clamped in place therein.

In the several figures of the drawing, like reference numerals indicate like parts. Reference numerals i and 2 indicate the base plates which carry the arcuately shaped brackets 3 and 4 respectively. Each base plate and its bracket is preferably cast of aluminum and suitably reinforced at the junction of the bracket with its base plate by reinforcing ribs 5 to make each combined base plate and bracket both light in weight and rigid in construction. As illustrated in the various figures the brackets are arranged side by side. Bracket 3 is provided with the arcuately extending slot '6 and bracket 4 with a corresponding slot 1, and both of these slots are arranged in their respective brackets so that portions thereof remain at all times in registry along side each other.

For the purpose of guiding the adjusting movement of the brackets in a predetermined arcuate path corresponding to the arcuate shape of the slots 6 and i, each bracket is provided with guide means in the form of lugs which are provided in the outer end of each bracket. Thus bracket 3 is provided with the guide lug 8 for engagement with the slot l and bracket is provided with the guide lug 9 for engagement with the slot 6.

The brackets .25 and 4 are held together with their guide lugs 8 and '9 in engagement with the guide slots 6 and l by means of the inverted U- shaped bracket I0, which is adapted to straddle the brackets intermediate the base plates l and 2. A clamping bolt ll extends from one side of the inverted U-shaped bracket Ill through both of the slots 8 and l for engagement into the other side of the inverted U-shaped bracket wher it is threadedthrough the square clamping nut I2.

This nut is located in a groove I3 provided on the inside of the inverted U-shaped bracket H3, adjacent the edges of the outside of the slot '1 in the bracket 4.

Rotation of the clamping bolt H by means of its head M will cause the clamping nut 12 to be drawn against the outside of the bracket 4 while the inside of the opposing portion of the inverted U-shaped bracket In is simultaneously drawn against the outside of the bracket 3. In this way both brackets 3 and 4 are tightly drawn together the full length thereof while bracket H) is firmly clamped in place in its desired location on the brackets. A look washer i5 is preferably interposed between the head I l and the outside of the bracket H3 in order to keep the bolt from loosening up after the bracket has been clamped in place.

The support 16 for the mast is located on top of the bracket 19 and part of it is integrally formed therewith. This integral portion comprises the bottom H and the fixed section 18 of a rectangularly shaped vertically arranged socket. The adjustable section I 9 of this socket is held adjacent to the fixed portion by means of the clamping bolts 20 and 2! which pass through suitable ears formed on the fixed and movable section of the socket and have the clamping nuts 22 and 23 threaded thereto. The nuts are held fixed on the outside of the section 19 so that rotation of the clamping bolts will cause the nuts, and with it the section IE2, to move away or be drawn to the fixed section it! of the socket in order to adjust the socket to the diameter of the mast to be inserted thereinto and be firmly clamped in place therein.

For the purpose of anchoring the mounting to the roof, each of the base plates 1 and 2 is provided with a pair of slots 24-24 through which suitable bolts or lag screws are adapted to pass for engagement into the roof in order to firmly hold the mounting in place thereon after it is adjusted thereto.

While I have illustrated and described a preferred embodiment of my novel adjustable mounting, it is to be understood that various changes and modifications are possible and may be made therein without departing from the scope of my invention as more particularly pointed out by the hereto appended claims.

I claim:

1. An adjustable base for poles comprising a pair of base plates, an arcuately shaped bracket projecting from each of said base plates, means for slidably connecting said brackets for effecting angular adjustment of said base plates relative to each other, and pole supporting means arranged on said brackets and jointly supported by said connecting means.

2. An adjustable base for poles comprising a pair of base plates, an are shaped bracket projecting from each of said base plates, means connecting said brackets for arcuate movement of said base plates toward and away from each other and simultaneous angular adjustment relative to each other, and pole supporting means arranged on said connecting means and jointly sup ported thereby.

3. An adjustable base for poles comprising a pair of base plates, a bracket on each of said base plates having a longitudinally extending are shaped slot therein, clamping and guiding means engaging the slots in said brackets for slidably adjustable connection of said brackets and anguadjacent to each other, a pole supporting pair of bracket members depending from said pole support and spaced to engage the outside of said sliding brackets, a clamping nut held against rotation in one of said bracket members for clamping contact with one of said sliding brackets, and a clamping bolt mounted in the other of said bracket members and passing through the slots of both of said sliding brackets into threaded engagement with said clamping nut to effect a rigid and adjustable clamping connection between said pair of brackets and between said brackets and said bracket members.

5. An adjustable support for poles comprising a. pair of brackets arranged for adjustable sliding 20 2,439,061

movement adjacent each other and with slots extending longitudinally therein in registry with each other, a pole support embracing said pair of brackets for adjustable sliding movement thereon, a clamping bolt carried by said pole support in engagement with the slots in said brackets, and a clamping nut carried by said pole support in threaded engagement with said clamping bolt to efiect simultaneous adjustable clamping engagement between said pair of sliding brackets and between said pole support and said sliding brackets.

HAROLD O. LANDIS.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Name Date Shur Apr. 6, 1948 Shur Apr. 6, 1948 Number 

